SM UB-57

UB-148 at sea, a U-boat similar to UB-57.
History
German Empire
Name:	UB-57
Ordered:	20 May 1916
Builder:	AG Weser, Bremen
Cost:	3,276,000 German Papiermark
Yard number:	269
Launched:	21 June 1917
Commissioned:	30 July 1917
Fate:	sunk 14 August 1918 at 51°56′N 02°02′E / 51.933°N 2.033°E / 51.933; 2.033Coordinates: 51°56′N 02°02′E / 51.933°N 2.033°E / 51.933; 2.033 by a mine, 34 dead
General characteristics
Class and type:	German Type UB III submarine
Displacement:	516 t (508 long tons) surfaced 646 t (636 long tons; 712 short tons) submerged
Length:	55.85 m (183 ft 3 in) (o/a)
Beam:	5.80 m (19 ft)
Draught:	3.72 m (12 ft 2 in)
Propulsion:	2 × propeller shaft 2 × Körting four-stroke 6-cylinder diesel engines, 1,050 bhp (780 kW) 2 × Siemens-Schuckert electric motors, 780 shp (580 kW)
Speed:	13.4 knots (24.8 km/h; 15.4 mph) surfaced 7.8 knots (14.4 km/h; 9.0 mph) submerged
Range:	9,020 nmi (16,710 km; 10,380 mi) at 6 knots (11 km/h; 6.9 mph) surfaced 55 nmi (102 km; 63 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged
Test depth:	50 m (160 ft)
Complement:	3 officers, 31 men
Armament:	5 × 50 cm (19.7 in) torpedo tubes (4 bow, 1 stern) 10 torpedoes 1 × 8.8 cm (3.46 in) deck gun
Service record
Part of:	Flandern I Flotilla 20 September 1917 – 14 August 1918
Commanders:	Kptlt. Otto Steinbrinck 3 July 1917 – 1 January 1918 Oblt.z.S. Johannes Lohs 2 January – 14 August 1918
Operations:	11 patrols
Victories:	47 merchant ships sunk (129,173 GRT) 10 merchant ships damaged (58,990 GRT)

SM UB-57 was a German Type UB III submarine or U-boat in the German Imperial Navy (German: Kaiserliche Marine) during World War I. She was commissioned into the Flanders Flotilla of the German Imperial Navy on 30 July 1917 as SM UB-57.

She operated as part of the Flanders Flotilla based in Zeebrugge. UB-57 was sunk at 23:00 on 14 August 1918 at 51°56′N 02°02′E / 51.933°N 2.033°E / 51.933; 2.033 after striking a mine, 34 crew members lost their lives in the event.

She was built by AG Weser, Bremen and following just under a year of construction, launched at Bremen on 21 June 1917. UB-57 was commissioned later that same year under the command of Kptlt. Otto Steinbrinck. Like all Type UB III submarines, UB-57 carried 10 torpedoes and was armed with a 8.8 cm (3.46 in) deck gun. UB-57 would carry a crew of up to 3 officer and 31 men and had a cruising range of 9,020 nautical miles (16,710 km; 10,380 mi). UB-57 had a displacement of 516 t (508 long tons) while surfaced and 646 t (636 long tons; 712 short tons) when submerged. Her engines enabled her to travel at 13.4 knots (24.8 km/h; 15.4 mph) when surfaced and 7.8 knots (14.4 km/h; 9.0 mph) when submerged.